[INFO] crate mtbl 0.2.1 is already in cache
[INFO] checking mtbl-0.2.1 against beta-2019-10-27 for pr-65897
[INFO] extracting crate mtbl 0.2.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate mtbl 0.2.1 on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mtbl 0.2.1
[INFO] finished tweaking crates.io crate mtbl 0.2.1
[INFO] tweaked toml for crates.io crate mtbl 0.2.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 88dac3d76706f7766e73ee9b6ad77ae291bc780e07446ac787c49a8453f2a55e
[INFO] running `"docker" "start" "-a" "88dac3d76706f7766e73ee9b6ad77ae291bc780e07446ac787c49a8453f2a55e"`
[INFO] [stderr]    Compiling lz4-sys v1.8.3
[INFO] [stderr]     Checking mtbl-sys v0.2.0
[INFO] [stderr]    Compiling cargo_metadata v0.6.4
[INFO] [stderr]     Checking mtbl v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling skeptic v0.13.4
[INFO] [stderr]    Compiling lz4 v1.23.1
[INFO] [stderr] error[E0658]: use of unstable library feature 'test'
[INFO] [stderr]  --> benches/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | extern crate test;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/50297
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'test'
[INFO] [stderr]  --> benches/lib.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use test::Bencher;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: for more information, see https://github.com/rust-lang/rust/issues/50297
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'test'
[INFO] [stderr]   --> benches/lib.rs:11:26
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn bench_get(bench: &mut Bencher) {
[INFO] [stderr]    |                          ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/50297
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'test'
[INFO] [stderr]   --> benches/lib.rs:25:11
[INFO] [stderr]    |
[INFO] [stderr] 25 |     bench.iter(|| reader.get(format!("{:09}", range_gen.ind_sample(&mut rng))));
[INFO] [stderr]    |           ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/50297
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: could not compile `mtbl`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "88dac3d76706f7766e73ee9b6ad77ae291bc780e07446ac787c49a8453f2a55e"`
[INFO] running `"docker" "rm" "-f" "88dac3d76706f7766e73ee9b6ad77ae291bc780e07446ac787c49a8453f2a55e"`
[INFO] [stdout] 88dac3d76706f7766e73ee9b6ad77ae291bc780e07446ac787c49a8453f2a55e